Garage fitted wrong battery?

Hi folks

Last week I had to have a new alternator on my 2002 Fabia (1.9Tdi). When the garage phoned me with a price, they said it 'might need a new battery as well'. Fair enough. It was old.

When I went to collect it, sure enough they'd fitted a new battery. With one hour's labour and VAT, the total was a shade under £300, including £55 + VAT for the battery.

I was giving the car a once-over today before MoT, and decided to check the battery. The one they've fitted is Toyota branded. 53Ah, 430 CCA.

This sounds very low to me. When I stick my reg into ECP, all the batteries that come back are 70Ah or over, and more CCA too.

So have they given me a crap battery? Or is the one they've fitted enough? I can't find an official spec anywhere - if I go back to them, I'd like to be able to say 'Look - this is the spec you should have fitted. Please replace it'.

Cheers